title: A model for combined targeting and tracking tasks in computer applications.
abstract: Current models for targeted-tracking are discussed and shown to be inadequate as a means of understanding the combined task of tracking, as in the Drury's paradigm, and having a final target to be aimed at, as in the Fitts' paradigm. It is shown that the task has to be split into components that are, in general, performed sequentially and have a movement time component dependent on the difficulty of the individual component of the task. In some cases, the task time may be controlled by the Fitts' task difficulty, and in others, it may be dominated by the Drury's task difficulty. Based on an experiment carried out that captured movement time in combinations of visually controlled and ballistic movements, a model for movement time in targeted-tracking was developed.
authors.affiliation: Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, ransalu.senanayake@family.ust.hk.
authors.forename: Ransalu
authors.initials: R
authors.lastname: Senanayake
authors.forename: Errol R
authors.initials: ER
authors.lastname: Hoffmann
authors.forename: Ravindra S
authors.initials: RS
authors.lastname: Goonetilleke
mesh_terms: D000293:Adolescent; D000328:Adult; D003201:Computers; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008954:Models, Biological; D009068:Movement / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D013997:Time Factors; D014785:Vision, Ocular / Q000502:physiology*; D055815:Young Adult